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Method and apparatus for determining battery status in a vehicle

A battery and status technology, applied to instruments, vehicle components, vehicle energy storage, etc., can solve problems such as inaccurate results

Active Publication Date: 2019-12-24
VOLVO CAR CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the results obtained by the disclosed battery tester are still not accurate enough

Method used

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  • Method and apparatus for determining battery status in a vehicle
  • Method and apparatus for determining battery status in a vehicle
  • Method and apparatus for determining battery status in a vehicle

Examples

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Embodiment Construction

[0030] In the present detailed description, various embodiments of the method according to the invention are mainly described with reference to a 12V battery in a vehicle comprising an internal combustion engine and an alternator for charging the battery. However, the method is equally applicable to other types of batteries, such as 24V batteries, and other devices for charging batteries may also be employed.

[0031] figure 1 is a schematic diagram of a vehicle 100 including a 12V battery 102 that may be tested according to one embodiment of the invention. The test is shown here as being performed by a battery tester 104 connected to the vehicle's communication interface such that the battery tester 104 can read information from the battery's battery monitoring sensor (BMS).

[0032] Figure 2A is a flowchart depicting the general steps of a method according to one embodiment of the invention. will refer to Figure 2A The flowchart in and image 3 The figures in describe...

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PUM

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Abstract

A method for determining the state of a battery in a vehicle, the method comprising: determining an initial temperature and an initial state of charge of the battery; controlling the initial state of charge SoC not to exceed a predetermined threshold and the initial temperature T not to be lower than a predetermined threshold; based on the initial state of charge of the battery Temperature and initial state of charge determine the current threshold; start the vehicle's engine; charge the battery for a predetermined time period t 1 charging; in the charging time period t 1 Two charging currents to the battery I are measured at two predetermined points in time during 1 and I 2 ; based on the measured charging current at time t 3 =t 1 +t 2 Determining an expected current value; comparing the expected current value to a current threshold; and determining that the battery is faulty if the expected current value is below the current threshold.

Description

technical field [0001] The present invention relates to a method and apparatus for determining the state of a battery in a vehicle. Background technique [0002] 12V batteries have historically been subject to frequent, costly replacements related to warranty claims. There are several different reasons why batteries should always be replaced before the warranty expires. One of the main reasons for these replacements is due to the imprecise judgment of the battery testing methods used by the workshop. [0003] It is difficult to perform battery testing quickly and without removing the battery from the vehicle. Accurate battery testing methods typically take several days and require large, expensive and stationary test equipment. Handheld battery testers are often used to determine battery health in connection with warranty claims, using high frequencies and low voltages to calculate the battery's impedance. Impedance is also used to some extent to determine the health of ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B60W20/13G01R31/36
CPCG01R31/387G01R31/392G01R31/3648Y10S903/904B60L58/12Y02T10/70G01R31/371B60W20/13
Inventor T·拉松A·恩斯特伦L·弗兰森M·特恩格伦F·福格尔贝里P·托松P·阿尔姆哈根E·瓦尔D·米迪霍尔姆
Owner VOLVO CAR CORP